/*
 * Copyright (C) 2018 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

syntax = "proto2";
option optimize_for = LITE_RUNTIME;
package perfetto.protos;

import "perfetto/common/sys_stats_counters.proto";

// Various Linux system stat counters from /proc.
// The fields in this message can be reported at different rates and with
// different granularity. See sys_stats_config.proto.
message SysStats {
  // Counters from /proc/meminfo. Values are in KB.
  message MeminfoValue {
    optional MeminfoCounters key = 1;
    optional uint64 value = 2;
  };
  repeated MeminfoValue meminfo = 1;

  // Counter from /proc/vmstat. Units are often pages, not KB.
  message VmstatValue {
    optional VmstatCounters key = 1;
    optional uint64 value = 2;
  };
  repeated VmstatValue vmstat = 2;

  // Times in each mode, since boot. Unit: nanoseconds.
  message CpuTimes {
    optional uint32 cpu_id = 1;
    optional uint64 user_ns = 2;         // Time spent in user mode.
    optional uint64 user_ice_ns = 3;     // Time spent in user mode (low prio).
    optional uint64 system_mode_ns = 4;  // Time spent in system mode.
    optional uint64 idle_ns = 5;         // Time spent in the idle task.
    optional uint64 io_wait_ns = 6;      // Time spent waiting for I/O.
    optional uint64 irq_ns = 7;          // Time spent servicing interrupts.
    optional uint64 softirq_ns = 8;      // Time spent servicing softirqs.
  }
  repeated CpuTimes cpu_stat = 3;  // One entry per cpu.

  // Num processes forked since boot.
  // Populated only if FORK_COUNT in config.stat_counters.
  optional uint64 num_forks = 4;

  message InterruptCount {
    optional int32 irq = 1;
    optional uint64 count = 2;
  }

  // Number of interrupts, broken by IRQ number.
  // Populated only if IRQ_COUNTS in config.stat_counters.
  optional uint64 num_irq_total = 5;  // Total num of irqs serviced since boot.
  repeated InterruptCount num_irq = 6;

  // Number of softirqs, broken by softirq number.
  // Populated only if SOFTIRQ_COUNTS in config.stat_counters.
  optional uint64 num_softirq_total = 7;    // Total num of softirqs since boot.
  repeated InterruptCount num_softirq = 8;  // Per-softirq count.

  // The time at which we finish collecting this set of samples;
  // the top-level packet timestamp is the time at which
  // we begin collection.
  optional uint64 collection_end_timestamp = 9;
}